/// ------------------------------------------------------------------------------------
/// <summary>
/// Sets the value for persisting, and returns the same value, potentially modified
/// </summary>
/// ------------------------------------------------------------------------------------
public virtual string SetStringValue(FieldInstance newFieldInstance)
{
newFieldInstance.Value = (newFieldInstance.ValueAsString ?? string.Empty).Trim();
var oldFieldValue = MetaDataFieldValues.Find(v => v.FieldId == newFieldInstance.FieldId);
if (oldFieldValue == newFieldInstance)
{
return(newFieldInstance.ValueAsString);
}
string oldValue = null;
if (oldFieldValue == null)
{
MetaDataFieldValues.Add(newFieldInstance);
}
else
{
oldValue = oldFieldValue.ValueAsString;
oldFieldValue.Copy(newFieldInstance);
}
LoadFileSizeAndDateModified();
OnMetadataValueChanged(newFieldInstance.FieldId, oldValue, newFieldInstance.ValueAsString);
return(newFieldInstance.ValueAsString); //overrides may do more
}
/// ------------------------------------------------------------------------------------
/// <summary>
/// Sets the value for persisting, and returns the same value, potentially modified
/// </summary>
/// ------------------------------------------------------------------------------------
public virtual object SetValue(string key, object newValue, out string failureMessage)
{
failureMessage = null;
object oldFieldValue = null;
var oldFieldInstance = MetaDataFieldValues.Find(v => v.FieldId == key);
if (oldFieldInstance == null)
{
if (newValue == null)
{
return(null);
}
MetaDataFieldValues.Add(new FieldInstance(key, newValue));
}
else if (oldFieldInstance.Value.Equals(newValue))
{
return(newValue);
}
else
{
oldFieldValue = oldFieldInstance.Value;
}
LoadFileSizeAndDateModified();
OnMetadataValueChanged(key, oldFieldValue, newValue);
if (oldFieldInstance != null)
{
oldFieldInstance.Value = newValue;
}
return(newValue);
}